Increase Decrease (again)

[Kristoffer]

Hi!

Earlier I got some great help with my program. I'm using a quadrature encoder to measure a motors rotation velocity. Since I couln't get anything else to work, I'm sampling the inputs from the rotary encoder with analog inputs, wich seems to work fine. I get one LED to lit when the motor runs in one direction, and anotherone to lit when the motor is rotating the different way. Now I just need to count the pulses: +1 for each time pulse in one direction, and -1 for each pulse the other way.

I believe that the problem explains itself the best in my attached VI. Hope anyone can be helpful with my big (but simple I guess) problem 🙂

[GerdW]

Hi Kristoffer,

use one more shift register... And cleanup your code


Message Edited by GerdW on 04-15-2008 08:46 PM

[Kristoffer]

Tanks 🙂

Unfortunately, this doesn't solve the problem. Problem now is that the program adds one number  w h i l e  the pulse is high. If the pulse is long enough the program can add for instance 50 numbers pr pulse. Each time I've got an incoming pulse, I just need ONE increment /decrement.

But thanks a lot for your time, and thank you for your tups on cleaning up my code. Of course you've already understood that I'm a really rookie to LabView 🙂

[GerdW]

Hi Kristoffer,

you didn't mention before that you only want to count rising edges...

See attachment! (I'm sure the boolean calculations can be simplified even more now...)

[Kristoffer]

I guess I didn't write that, sorry about that.

And thanks a lot! You really saved the day! Now, as soon as I find out how to rate a good answer I'll give you an A+

THANKS 😄